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Frictionless Sliding Magnet

  1. Oct 2, 2014 #1
    I am attempting to build a linear induction flashlight. I was wondering if the concept below could be used to make the magnet slide down a pole inside a coil with no friction. The interior of a tube magnet with an S polarity would slide down the S end of a rod magnet, that way the inside of the tube would be equally repelled on all sides making the fall frictionless. Could this concept work? Also, would this continuous interaction between the magnets cause either of the magnets to become demagnetized if a neodymium magnet is used? Is there an easier way to create a frictionless fall? Any advice at all on how to make this work? (the tube magnet would not be a monopole) (sorry for any misused terms)

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  3. Oct 7, 2014 #2
    Thanks for the post! Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
  4. Oct 9, 2014 #3
    Can you explain this to me a little bit more?
  5. Oct 10, 2014 #4


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    As drawn you don't have a south pole on the sides of the pole, only on the bottom end. If you try and fix that by arranging a lot of little magnets radially to make a pole that is S on the outside and N on the inside you will find that the further from the end you get the weaker the effect. At any significant distance from the end there will be no field. There are easier ways to reduce friction.
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